0402HM-121EJTS

Fixed Inductors Overview

The 0402HM-121EJTS is a fixed inductor from Delta Electronics/Components, featuring a ceramic drum core and wirewound construction. It offers an inductance of 120 nH with a tolerance of ±5%. The component has a DC resistance of 2.66 Ohms and a rated current of 110 mA. It operates within a temperature range of -40°C to 125°C and provides a Q factor of 20 at 250 MHz. The self-resonant frequency is 1.8 GHz, tested at 250 MHz. Packaged in a compact 0402 (1005 Metric) surface-mount footprint measuring 1.15mm x 0.70mm x 0.60mm max.

Fixed Inductors Feature Summary

• Unshielded wirewound design utilizing a ceramic drum core for stable RF performance.
• Compact 0402 surface-mount package suitable for high-density PCB layouts.
• High self-resonant frequency capability up to 1.8 GHz for RF applications.

Fixed Inductors Applications

• RF circuit matching networks
• High-frequency signal filtering
• Impedance matching in wireless communication modules

Fixed Inductors Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to ensure correct tolerance and packaging configuration. Confirm that the component status aligns with project requirements, as availability may vary. Cross-reference the DigiKey part number 2035-0402HS-121EKTSTR-ND for accurate sourcing details. Ensure compliance with RoHS3 specifications if required by the end product regulations.

Fixed Inductors Selection Notes

Select this component when a low-inductance value near 120 nH is required for high-frequency operation. The 110 mA current rating suits low-power RF stages rather than power delivery lines. Consider the 2.66 Ohm DC resistance impact on circuit efficiency. The unshielded nature requires careful layout consideration to minimize electromagnetic interference with nearby sensitive traces.

Fixed Inductors Part Context

This part belongs to the 0402HM series, which focuses on small-form-factor inductors. Unlike the 0402HS series which shares similar electrical parameters but different packaging or tolerances, the HM series specifically denotes the drum core construction optimized for these dimensions. It serves as a passive component in RF front-ends where space constraints are critical.

Fixed Inductors Replacement Considerations

Direct substitutes include other 120 nH ±5% inductors in 0402 packages from manufacturers like Murata or TDK, provided they meet the 110 mA current and 2.66 Ohm DCR limits. Verify that alternative parts maintain similar self-resonant frequencies to avoid impedance mismatches in the target RF application.